#include <stdio.h>
//分数加法
int main(void)
{
	int num1, denom1, num2, denom2, result_num, result_denom;

	printf("Enter two fractions separated by a plus sign:");
	scanf("%d/%d+%d/%d", &num1, &denom1, &num2, &denom2);

	result_num = num1*denom2 + num2*denom1;
	result_denom = denom1*denom2;
	printf("The sum is %d/%d\n", result_num, result_denom);

	return 0;
}